Question

我有一个框架，我可以动态添加线条点击工具按钮。我需要所有这些lineedits在信号textChanged上使用我的自动完成器。我不太明白该怎么做。我在研究lambda可能有所帮助时看到了，但我无法做到。我想这是因为我很难理解这一切是如何运作的。我使用QtDesigner和this教程来制作GUI。我的代码有两个文件 - 第一个只有小部件：

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(799, 424)
        ...
        self.toolbutton_add_score = QtWidgets.QToolButton(self.groupbox_scores)
        self.toolbutton_add_score.setObjectName("toolbutton_add_score")
        self.layout_groupbox_scores.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.toolbutton_add_score)
        self.frame_movies_scores = QtWidgets.QFrame(self.groupbox_scores)
        self.frame_movies_scores.setObjectName("frame_movies_scores")
        self.layout_frame_movies_scores = QtWidgets.QGridLayout(self.frame_movies_scores)
        self.layout_frame_movies_scores.setObjectName("layout_frame_movies_scores")
        self.lineedit_input_movie = QtWidgets.QLineEdit(self.frame_movies_scores)
        self.lineedit_input_movie.setObjectName("lineedit_input_movie")
        self.layout_frame_movies_scores.addWidget(self.lineedit_input_movie, 0, 0)

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Рекомендательная система"))
        ...

在第二个中有我的功能：

class MyWin(QtWidgets.QMainWindow):
    def __init__(self, parent = None):
        QtWidgets.QWidget.__init__(self, parent)
        self.ui = Ui_Form()
        self.ui.setupUi(self)
        self.ui.lineedit_input_movie.textChanged.connect(self.autocomplete)
        self.ui.toolbutton_add_score.clicked.connect(self.add_score_field)

    def autocomplete(self):
        cursor.execute("SELECT title FROM movies WHERE title LIKE '%%' || %s || '%%';", (self.ui.lineedit_input_movie.text(),))
        it = cursor.fetchall()
        strings = [item[0] for item in it]
        completer = QtWidgets.QCompleter(strings, self)
        self.ui.lineedit_input_movie.setCompleter(completer)
        self.ui.lineedit_input_movie.show()

    def add_score_field(self):
        self.lineedit_input_movie = QtWidgets.QLineEdit(self.ui.frame_movies_scores)
        self.lineedit_input_movie.setObjectName("lineedit_input_movie")
        self.ui.layout_frame_movies_scores.addWidget(self.lineedit_input_movie, r, 0)

此处的代码仅适用于布局中的fires lineedit。我该怎么做才能使它适用于布局中的所有lineedits？

Answer 1

您需要将其他字段放在列表中以保留其引用。目前你正在覆盖你现有的不好的领域。您还需要为每个新字段连接textChanged信号。

class MyWin(QtWidgets.QMainWindow):

    def __init__(self, parent = None):

        self.score_fields = []
        # ...


    def add_score_field(self):

        # Create a new Line Edi
        new_lineedit = QtWidgets.QLineEdit(self.ui.frame_movies_scores)
        new_lineedit.setObjectName("lineedit_input_movie")

        # append it to your score_fields list
        self.score_fields.append(new_lineedit)

        # add it to your layout
        self.ui.layout_frame_movies_scores.addWidget(new_lineedit, r, 0)

        # connect your signal
        new_lineedit.textChanged.connect(self.autocomplete)

将动态制作的小部件绑定到PyQt5中的一个信号

1 个答案: